pkg flag, func BoolFunc(string, string, func(string) error) #53747
pkg flag, method (*FlagSet) BoolFunc(string, string, func(string) error) #53747
pkg go/ast, func IsGenerated(*File) bool #28089
+pkg go/ast, func NewPackage //deprecated #52463
pkg go/ast, type File struct, GoVersion string #59033
+pkg go/ast, type Importer //deprecated #52463
+pkg go/ast, type Object //deprecated #52463
+pkg go/ast, type Package //deprecated #52463
+pkg go/ast, type Scope //deprecated #52463
pkg go/build/constraint, func GoVersion(Expr) string #59033
pkg go/build, type Directive struct #56986
pkg go/build, type Directive struct, Pos token.Position #56986